Change-speed-gear transmission mechanism.



f NM? Patented Oct. 22n 19H3.

F. H. CATHCART.

APPLICATION man Nov. 23. 191e.

IIL

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CHANGE SPEED GEAR TRANSMISSION MECHANISM.

N111 afro: nog

` F. H. CATHCART. CHANGE SPEED GEAR TRANSMISSION MECHANISM.

APPLICATION FILED NOV. 23. 19H3.

Patented Oct. 22, HHS.

F. H. CATHCART. CHANGE sPEE GEAR TRANsMlssxoN MECHANISM.

' APELICATION FILED NOV. 23. 1916. L, Patented m2112918.

f 5 SHEETS-SHEET 3.

attenta F. H. CATHCART. CHANGE SPEED GEAR TRANSMISSION MECHANISM.

APPLICATON FILED NOV. 23. l9l6.

SHEETS-SHED 4.

F. H. CATHCART.

CHANGE SPEED GEAR TRANSMISSION MECHVANISM. APPLCATION man NovA 23. 191s.

Patented Uct. 22, 1918.

Spe intention o' Letters Patent.

mmm

E' PARK, 'VIERGE-NIA.

TRANS@ XSSQN MECHNISE.

Patented 0st. 22, li918.

vApplcation ne 'November e3, 3.9116. Serial No. 132,986.

To all whom 21' may concern:

Be it known Athat l FRANK la. Cri'rrrcenr a citizen of the United States', residing at Cottage Park, in the county of Alexandria, and State of Virginia, have invented certain new and useful Improvements in Change- Speed-Gear Transmission Mechanism, of which the following is a specification.

My invention consists of an improved change speed gear transmission mechanism and is particularly adaptedfor use on automobiles or other motor driven vehicles but can also be used with advantage `any place where a change speed transmission mechanism is required.

One object of my invention is to provide a transmission mechanism employing gears., all of which are non-slidable thereby avoiding breakage of the gears and greatly reducing the noise ot' the mechanism during its operation.

Another object is to so construct im- Y proved transx'nission mechanism that it 'will be durable, of comparatively simple con struction, and can be manufactured and stalled at a low cost.

A further object is to so malte my improved transmission mechanism that can be operated by a single lever in the manner which is non; practically universal 'to give a number of forward speeds and a reverse, this construction being especially desirable for use on an automobile or 'other vehicle.

rlhese objects, and other advantageous ends which will be described hereinaiter, l attain in the following manner. reference being had to the accompanying drawings in which- L Figure l is a sectional elevation of my invention showing the gears, clutches, and clutch operating means in section.

Fig. 2 is a transverse section on the line a-c of Fig. l.

3 is a transverse section on the line -o oi Fig. l showing the gears which operate to form the reverse.

. Fig. l is a fragmentary plan view oit clutch. shifting rods at. a point where the shifting lever engages means on said rod for mbving either of the rods in opposite directions.

motor driven the Fig. 5 is an elevation of my invention of similar nature to that shown in Fig. 1 but showing the gears, clutches and clutch moving means in outside view and the casing and bearing portions in section', said casing being designed to be lsecured to the motor casing in the forward portion 'of an automobile.-

Fig. is a plan view ofmy invention showing the casing and bearings in section and designed to be placed adjacent the rear driving end of an automobile and Ihaving a. universal joint connected therewith, so that it may be driven from the motor which is located in a forward position.

Fig. 7 is an elevation partly in section including certain modificationsof the, ele.

ments of my invention.

Referring to Figs. 1 to 5 inclusive, 1 is a casing forming a housing for themovab'le portions of my improved transmission mechanismfsald casing having a partltlon 2 which forms a support for a' ball bearing 3 preferably of the well known S. K.' F. type employing inner and outer sleeves 4; and 5 which are spaced apart and form races for balls 6.

The front end?v of the casing has an opening 8 through which extends a rimary drive shaft 9, and a gland or studi/)ng box l0 surrounds said shaft 9 and, forms a closure to retain packing 11, the 'latter #forming a seal for the opening 8 to prevent lubricant, i

with which casingl is filled, from leak ing;f through said opening 8.w

The rearend l2 of the primary drive shaft 9 extends through the sleeve 4 of the bearing' 3. the connection between said sleeve 4 and the end l2 being rigid, so that said sleeve 4 rotates with the end l2. A i'ange 13 is formed on the extreme rear end of the shaft l? and prevents longitudinal movement of said-shaft in a forward direction.

The bearing is inclosed within e housing which is made in two parts 14 and .15." The part l5 has an inwardly turned flange 16 which engages the inner end of the sleeve :3,while the forward end 17 yis' hanged outwardly and engages the forward surface of the partition 2. 4 f

The part le forms a. front cover plate for the bearing and-bolts 18 extend through the y securely holding the bearing 3 to said rearward direction. A bushing 20 surrounds the shaft 9 .and has an outwardly projecting flange 21 at its inner end which is secured by screws 22 or other suitable means to the cover plate 14. The bushing 20 forms a projecting clutch teeth 24.

27, so that said 9 to the pinion 23.

" 'the casing '-end of the bushing bearing for a pinion 23 having forwardly A 'washer 25 is threaded into the'forward 20 and has a flange 26 which prevents forward longitudinal movement of the pinion 23, it being noted that.)` the flange 21 prevents longitudinal movement of said pinion in a rearward direction. Keys 27 are secured to the shaft -9 at different positions throughout its circumference and are preferably provided with wedge-shaped ends 28 which bear against the washer 25. A clutch collar 29 is slidably secured to the shaft 9 through the medium of the keys clutch collar 29 rotates with and moves longitudinally thereon. vThis clutch collar 29 has clutch teeth 3Qy which are designed to operatively engage the clutch teeth 24 of the pinion 23, when the clutch collar is moved rearwardly, andthus impart the l shaft 9 However, when the clutch collar 29 is moved forwardly, the clutch teeth 24 and 30 will be disengaged and the pinion 23 will remain idle.

,The clutch collar 29 is annularly grooved at 31, and a fork 32 extends within said groove. The fork 32 is carried by an arm 33 which is slidable to a limited extent on a 34 which is slidably mounted in suitable bearings 35 and 36 in A collar 37 is secured to the rod 34, in the present instance by a pin 38, said collar, un-

' der conditions hereinafter set forth, being designed to engage and move the arm 34 to disengage the clutch collar 29 from the clutch teeth 24-on the pinion 23. The upper end of the arm 32 is reccessed at.39, and balled-encl 40V of a lever 41 engages said recess andis designed to move said arm in a direction to cause the engagement of the clutch teeth 24 and 30 to drive the pinion as above stated.

The lever 41 has a ball 42 which has a bearing in an extension 43 in the top of the casing, the upper end 44 ,of the lever 41 being engaged by a plunger.

45 in a superimposed Casin-geb, said plunger being` movable forwardly by means of a coiled spring 47 positioned within a cavity 48 in said casing 4G, the function of said spring 48 being to automatically move said the movement of the shaft a fulcrunrin the form of ieee-eee primary drive shaft 9 has a cylindrical recess 49 into which cxtends the forward end 50 of a secondary drive shaft 51, saidend 50 being of smaller diameter than the internal diameter of the recess 49 to permit the insertion of roller bearings 52.

The secondary drive shaft is supported at its rear end in a ball bearing 53, said bearing being supported in a housing 54 which is secured to the .rear end 55 of the casing l, a stuffing box 56 being secured to said housing 54 and providing packing 5T designed to prevent leakage of the lubricant ont of the 'casing 1 through the passage necessary for the inclusion of the balls 5S.

The rear end 59 of the secondary drive shaft 51 may be connected by universal coupling or other connecting means to a shaft (not shown) which leads to the real' driving gears of the automobile. The shaft 51 is provided' with two sets of keys 60 and 61 which are spaced at intervals around its circumference in a manner similar to the keys 27 on the primary drive shaft 9.

Clutch collars and 63 slide longitudinally of said secondary shaft 51 and are caused to rotate with said. shaft through the medium of said keys 60 and 61. The clutch collar 62 has clutch teeth 64 which are designed when it is moved forwardly, to engage clutch teeth 65 on the inner shaft 9. The clutch collar 62 also has clutch teeth 66 which, when it is moved in a rearward direction, forward face of a gear 68, the latter being loosely mounted on thishaft 51. The clutch collar G2 is movable in opposite directions, longitudinally of the shaft 51, by means of a fork 69 which engages an annular groove 70 in said clutch collar 62.

The fork G9 exten ds from' an arm 71 which is secured to the cl"tch shifting rod 34. The clutch .collar 63 has clutch teeth 72 which when it is slid loose on the shaft 51. The clutch collar 63 also has clutch teeth which., when it is moved in av rearward direction, engages clutch teeth 76 on a' reverse gear 77, the latter also being loosely mounted on the .shaft 51.'4

Each of the gears 68, 74, and 77 is provided with a hall bearing preferablyof the 55. K. F. type, each of said bearings consisting of an inner sleeve 78 which is secured to the shaft 51 and an outer sleeve Z9 which is secured within a recess or cavity in a respective gear. A

Balls 30 are inteposcd between the sleeves 78 and and thus permit rotary movement end 12 of the engage clutch teeth 67 on the forwardly, engages clutch y teeth (3 on a gear 74, the latter gear being rasate@ of the gears, but prevent longitudinal moveh ment of said gearsalong the shaft 51.

lt will he noted that in the drawings',.the clutch collars 62 and 63 are shown in a neu- I tral position, and when in this position do not engage any of the clutch teeth which they are intended to engage when moved longitudinall'y as hereinafter more fully described. i jack shaft 8i is mounted in suitable io ball hearings 82 and 83 in opposite ends of the casing 1, said jack: shaft bein tree to rotate but isprevented of any ongitudinal lmovement due to the engagement ofthe ends .of the shaft with the bearings. 5

Gear wheels I815i., 85, 8 6, and 87 are secured tothe jack shaft 81 hy means of a keySB mounted within said shaft 81. The gears 8a, 85, 86, and 87 are 'urther held against longitudinal movement-by spacing sleeves 89,90, and 91, the sleeve 89 being interposed between the hub of the gear 84: and the bearing 82. The sleeve extends between the gears y811 and85f and engages the hubs of said gears, while the sleeve 91 extends between 255 the gears 86 and 87 and engages. their respective hubs, so that it will be' understood that the Vgears 84, 85, 86, and 87 do not gears 68, 74.-, and 77, or 'the pinion 235.

,Se The pinion '23 is in mesh at all times with the gear 84,*the gears 68 and 74: being respectively in' mesh. 'with the gears 85 and 86 at all times. The gear 87 meshes with ,in intermediategear 92 which. is rotatably 'a mounted on a stud or arbor 93 secured to inner surface ef the casing (se'e Fig. 3) `l and this intermediate geen 92 meshes at all i times with the reverse gearl T251 .The clutch collar 63 has an annular groovelel into which extends a fork 95 'which projects from an arm 96, the latter being secured on a second clutch shifting 3 rod 97 ,said rod being slidable longitudinally i' in suitable hearings in the casing 1. The et; clutch shitting rods 3a and 97 are mounted :in substantially the same horizontal plane.

mnd are spaced apart as vclearly shown in Figs.. 2 and 3.

The rod 3ft has a sleeve 98 secured thereon, 5i* said sleeve being secured to the arm 7l. The

i sleeve 98 has an inwardly projecting exten.n l

f sion 99 (see Fig. Ll), said extension having a which is normally directly opposite recess 101 in an extension 102 on a sleeve 103, the latter being secured to the rod A clutch shifting lever 10ehas. a I

hall and socket connection in. the super imposed casing 46, and the lowerend or' the lever 10aextends between the rods 3a and ec 97 and is designed to engageeither of the recesses 180 or 101 so the lever 104e may he moved into either recess and after it has heen so moved, it may he further moved to slide either oi the rods Bil and. 97 longitudi- 65 nally in either direction,

have any longitudinal movement nor do the` J Spring-pressed plungers 106 and 107 are designed to engage any of a series of notches 108, 109, and formed in each of the rods 34 and 97, the function of said spring- 'pressed plungers 106 and. 107 being to pre- '10 vent accidental movement longitudinally .of the' lrods 34 and 97 and to hold said -rods'in the positions into which. they have? vheen moved by. the lever 104. As illustrated, the

plunger 106 is shown in engagement with 75 I the notch 109 which is the neutral 'position dium of thel gear 84.

. ,lt will be further noted that in this posi- 85 tion the collar 37 is in engagement with the arm 32, so that a movement of the rod .34: in a forward direction will cause the collar .37 to move the arm 32 forwardly against the 'to move the clutch collar. 62 into operative engagement with the clutchteeth 65 on the 95. end of the shaft 9 and that the movement of said lshaft 9 will be imparted directly.tor the secondary shaft 51. However, when the I, clutch collar 62 is moved rearwardly, the spring 47 will act to move the clutch collo( lar 29 again` into operative engagement with the pinion 23 and thereby effect movement of the jack shaft andjincoupler theprimary drive .shaft from; iliesccnndary .drive shaft..k A movement of the clutch collarH 62 to the rear of its neutral position will cause ittoy operatively engage the clutch teeth 67 of' the gear 68, andsince the latter gear is also rotated due to the engagement of the clutch collar 29 with the pinion 23 as heieinbefore stated, the movement of the gear68 willhe imparted, to the clutch collar 62 and thence through the medium 'oit' the keys 60 to the secondary shaft 5l.

0n the other hand, if, afterthe clutch collar 62 has been returned to its normal po,- sition, the lever 104 is moved into engage-y ment with the recess 1.01 in the sleeve 103, and then moved to shift said rod 97 in a forward ldirection, the clutch' collar 63 will he moved into an operative engagement with the clutch teeth 73 of the gear 74. `With this connection, power will be transmitted through the, medium of the jack shaft, gears 86 and 7i and clutch collar 53 to rotate the 125 shaft 51, it `being ofcourse understood that the spring; d? is normally operative to causev the rotation of said' pinion 'fthrough the medium or" the clutch collar 29.

li the clutch shifting rod 97 is moved 85 and 68 are'of different relative diameters than are the gears 86 and 74. The gear 85 being of larger diameter than the gear 86, will effect the operation of the secondary shaft 51 at greater speed than will the gear 86, and hence the gear 85 imparts what may be termed an intermediate speed to thesecondary shaft 51, while the gear 86 imparts a 'slower movement to -the shaft 51, and said slower movement being commonly known as low gear.7

It will be noted that when'the clutch collar 62 is moved into operative engagement with the clutch teeth ($5 on the shaft 9 as above described, the secondary drive shaft 51 will rotate in unison with the primary drive shaft 9, and with this connection said shaft 51 will be driven at high speed.

lVith the elements positioned as shown in the several figures of drawing, the motion of the primary drive shaft 9 imparted to the jack shaft 81, but since there is no clutch connection with any of the gears on the secondary shaft 51, the latter will remain idle and the O'ears G8 74 and 77 will rotate loosely on said secondary shaft without rotating it.

To start the secondary shaft 51 in motion, the lever 104 is moved to slide the clutch Collar G3 in engagement with the clutch teeth 7 8 of the gear 74. The secondary shaft will then be rotated .at the lowest speedf After the secondary shaft has attained the desired momentum, the lever 104 may he moved to actnate the clutch collar G2 and move the latter into engagement with the clutch teeth 67 of the gear 68 'to thus impart an intermediate speed.

To secure high speed, the lever 104 is moved to rod 34 forwardly, thereby causing disengagement of the clutch collar 29` with the clutch teeth 24 of the pinion 23 and the movement of the clutch collar 02 into operative engagement with the clutch teeth 65. Then the secondary shaft 51 will be directly'coupled to the primary drive shaft 9.

In 'order to secure a reverse direction ot the` secondary shaft 51, the clutch collar 62 is moved to neutral by the operation of the lever-104 and the latteris then moved to rearwardly slide the rod 97 to effect movement of the clutch collar 63 into .'ative engagement with the clutchl teeth 7?? ai: the

gear 77. It will thus be seen that the movement of the lever 104 is similar to that employed by automobiles of dil'erent types now on the market in which a single lever is operative to secure different speeds forward and a reverse to the shaft which operates the dri ving wheels.

My invent-ion is of comparatively simple and durable construction and is practically operative in all places where hard usage may be expected. are practically of the' same construction as those described in connection with. Figs-.g1

to 5 inclusive, with the exception that thev clutch shifting rods 34 and 97are" more' widely spaced and a spring whichcorre sponds in service to thel spring 47 above noted, is differently housed and the lever 41 is eliminated.

T he other differences between Fig. 6 and the above described elements is comparatively slight, and in the following' description I will briefiy describe only such parts as differ from the above mentioned mechanism and will give the remaining elements the reference numerals corresponding with those above given them.

A. sleeve 111 is slidable within an opening In Fig. 6, the elements 112 in a casing 113, the latter corresponding in function to the casing 1 above mentioned. The sleeve 112 has an annular flange 114 which is designed to move within a cap 115 threaded onto a projection 116 on the casing 113. l

A coiled spring 117 is mounted within the cap 115 and is (ilesigned to bear upon the outer closed end thereof, and the flange 114 of the sleeve 112. The inner end of the sleeve 112 is designed to engage the arm 32 and to normally press said arm against the collar 37. The spring 117 acts in the same capacity as the spring 47 to move the arm 32 when permitted to do so by the rearward movement of the collar 37 and rod 34, the latter having its forward end slidable through the sleeve 112 and forward end of the cap 115. The primary drive shaft 9 in the present instance is shown connected to a universal joint 118 which, in turn, may be connected to a shaft leading from the motor which is in the forward part of the machine, it being remembered-that Fig. 6 shows a construction embodying 'my invention which is particular] designed to he located adjacent the rear or an automobile or other motor driven vehicle.

The-rear end of the secondarydrive shaft 51 is in the present instance provided With a beveled pinion 119-which meshes with a beveled gear 120 designed to drive the rear axle or wheels nf the vehicle, and may be 'the automatic movement of the clutch shiftnasse-.ao

v ing rod 34. Said means include a. spring i. 121 and a sleeve 122, the latter being forced on'the rod 34. so as to be rigidly fixed thereto. This sleeve is slidably mountedevvithin the casing 1, and the spring 121. is interposed between the inner end of the sleeve `122 and the end of an arm 33a, the latter being Slidable on the rod 34 in a manner sub-- stantially similar to the arnr33 and has a fork 32a in engagement with the groove 31 on the clutch collar 29. In all other respects the elements shown in Fi '7 are substantially similar to those descri ed in connection with Figs. 1 to 5 l5 inclusive, and I have therefore given like parts similar reference numerals. While I have described the forms of casing for my improved mechanism as of parl' ticular shapeto be positioned at the for- Wardand rear ends of a vehicle, it Will be noted that Amay use my invention. With advantage at points intermediate if so desire.

, While I have described my invention as taking a particular form, it Will be understood that the variousparts o f my inven- .tion may be changed Without departing fromv the spirit thereof, and hence I do 'not limit myself to the precise construction I 30. set forth, but consider that I am at liberty to make such changes and alterations. as fairly .come Within the scope of the appended claims.

, Having thus described ,my invention, what E claim as new and desire to secure by Letters Patent is: 1Q A gear transmission mechanism, com-- rising a primary drive shaft, a secondary riveshaft, a jack shaft, gears rigidly Xed 4 0 to the jack shaft, a fixed bearing, a pinion rotatable loosely onsaid bearing and in constant mesh With one of the gears on said jack shaft, gears loosely rotatable on said secondaryshaft and respectively in constant mesh with otherfof said gears on the jack; Hyshaft, clutch means Vadapted to operatively connect the, secondary shaft tothe primary shaft .and to any of said gears on the secn ondary shaft, and means rotatable in con-- 5 0 junction vvith'said primary shaft and movable into vdriving operation with the pinion on'said primary shaft, substantially as de" scribed.` v

2. A gear transmission mechanism, comprising a primary driveshaft, a secondary drive shaft, a jack shaft, gears rigidly fixed to the jack shaft, a fixed bearing, a pinion rotatable loosely on said fixed bearing and j in constant meshWith one of the gears on 'so said jack shaft gears loosely rotatable on said secondarys aft and respectively .in "conf stant'mesh with otherof saidgears on the ,jack shaft, clutch means :adapted lto opera' 'p tively connect ,the secondary shaft to the A(i5 primary.shfaft-and to any` of said fgears'nn .the clutch engaging portion on said gear on the secondary shaft, said pinion having clutch teeth thereon, and a member slidably keyed to said primary .shaft and having a portion for engagement with said clutch teeth on the pinion, substantially as de- 71 scribed. f l

3. gear transmission mechanism, comprising a primary drive shaft, a secondary drive shaft, a jack shaft, gears rigidly fixed to the jack shaft, a fined bearing, a pinion 75 rotatable loosely on said bearing and in constant mesh with one of the gears on said jack shaft, gears loosely rotatable on said secondary shaft and respectively in constant drive shaft, a jacl; shaft, gears rigidly fixed to the jack shaft, a fixed bearing, a pinion rotatable loosely on said rbearing land in constant mesh with one of the gears on said jack shaft, a' gear loosely rotatable on said secondary shaft and in constant mesh withone of said gears on said jack shaft, said gear on the secondary shaft having a clutch engaging portion thereon, means rotatable in conjunction with said primary-shaft and movable into driving operation With the pinion on said primary shaft, said primary shaft having a clutch engaging portion thereon, and means rotatable in conjunction with said secondary shaft and movable into operative engagement with either the clutch engaging means on said primary shaft or the secondary shaft, substantially as described.

5, A. gear transmission mechanism comprising a primary drive shaft, a secondary drive shaft, a ja'clr shaft, gears rigidly fixed to the jack shaft, a fixed bearing,` a pinion rotatable loosely on said bearing and'in con stent mesh with one ofthe gears on said v 'jack shaft, a gear loosely rotatable on said secondary shaft and in constant mesh with one of said gears on said jack shaft, said gear on the secondary shaft having'a clutch engaging portion thereon, -means rotatable in conjunction "-vith said primary shaft and movable into driving operation with the [125 pinion' on said primary '.shafasaid pri"=' shaftvhaviijig aclutch engaging por? Y tion thereon, means rotatable in conjunc 'tion Withfsaid 'secondary-shaft yand `movable t into operative engagement with either the to the jack clutch engaging means on said primary shaft or the clutch engaging portion on said gear on the secondary shaft, a. common means for moving the clutch engaging means on thevprimary .shaft and the clutch engaging means on the secondary shaft in one direction, and automatic means for'moving oneV of said clutch engaging means in an opposite direction, substantially as described.

6. A gear transmission mechanism comprising a primary drive shaft, a secondary drive shaft, a jack shaft, gears rigidly fixed shaft, a fixed bearing, a pinion rotatable loosely on said bearing and in constant mesh with one of the gears on said jack shaft, a gear loosely rotatable on said secondary shaft and in constant mesh With one of said gears on said jack shaft, Said gear on the secondary shaft having a clutch engaging portion thereon, means rotatable in conjunction with said primary shaftand movable into driving operation With the pinion on said primary shaft, said primary shaft having a clutch engaging portion thereon, means rotatable in conjunction With said secondary shaft and movable into operative engagement With either the clutch engaging means on said primary shaft or the clutch engaging portion on said gear on the secondary shaft, a common means for moving the clutch engaging means on the primary shaft and the clutch engaging means on the secondary shaft in one direction to move said clutch engaging means on the .pri` mary shaft out of operative engagement Withsaid pinion and to move the clutch engaging means on said secondary shaft into operative connection with the clutch engaging portion of the primary shaft, and automatic means operative to move the clutchl engaglng -means on the primary shaft into operative engagement with the pinion, saidautomatic means being operative when said clutch engaging means on the secondary shaft is moved out of connection With the clutch engaging portion on vthe primary shaft, substantially as described. s

A gear transmission mechanism comprising a primary drive shaft, a secondary drive shaft, a jack shaft, gears rigidly fixed to the jack shaft, a fixed bearing, va pinion rotatable loosely on said bearing'and in con stant mesh withone of the gears on said jack shaft, a gear loosely rotatable on said secondary shaft and in constant mesh with one of said gears on said jack shaft, said gear on the secondary shaft having a clutch engaging portion thereon, means rotatable in conjunction with said primary shaft and movable into driving operation with the pinion on said primary shaft, said primary shaft having a clutch engaging portion thereon, means rotatable in conjunction with said secondary shaft and movable into operative engagement with either the clutch tions to alternately connect engaging means on said primary shaft or the clutch engaging portion on said gear on the secondary shaft, a common means for moving the clutch engaging means on the primary shaft and the clutch engaging means on the secondary shaft in one direction tol move said clutch engagingmeans on theprmary shaft out of operative engagement with said pinion and to move the clutch engaging means on said secondary shaft into operative connection with the clutch engaging portion of the primary shaft, and automatic means operative to move the clutch engaging means on the primary shaft into operative engagement With the pinion, said automatic means being operative When said clutch engaging means on the secondary shaft is moved out of connection With the clutchy engaging portion on the primary shaft, Said common means having a member operative in conjunction therewith and designed to resist the action of said automatic means during the movement of the clutch engaging means on the secondary shaft out of enga ment with the clutch engaging portion on the primary shaft, substantially as described.

8. A gear transmission mechanism comprising a primary drive shaft, a secondary drive shaft, a jack shaft, gearsxed to the jack shaft, a loose With one of the gears on said jack shaft, a gear loosely rotatable on said secondary shaft and in constant mesh with one of said jack shaft, saidgear on the secondaryshaft having a clutch engaging portion,clutch engaging teeth on said primary shaft, a clutch collar slidably keyed on the secondary shaft, a clutch collar slidably keyed o n th'e primary shaft, a clutch portion on said pinion, a shifting rod, an arm slidable longitudinally on said shifting rod, `a collar secured to said rod for abutment With said arm, a spring operative to actuate said arm to move said latter clutch collar into engagement with said pinion,vand an army secured to said shifting rod for moving the o ther of said clutch collars in oppositedirecthe primary shaft and the gear on the secondary. shaft, said collar on the rod being adapted,'vvhen the clutch collar on the secondary-shaft is moved into operative engagement with the primary sh-aft, to engage the lirstmentioned arm and thereby move the primaryishaft clutch out of engagement with the pinion, substantially as described.

. 9. Agear transmission mechanismcomprising a primary dri-'ve shaft, a secondary drive shaft, a jackshaft, four gears fixed to the jack shaft, adoose pinion in. constant pinion in constant mesh mesh With one offthe gears onasaid jack shaft, three gears` loosely otata-ble Ion..;:said secondary shaft two offvvhich are respectively 1n constant mesh With two of said Vgears on said jack shaft, an intermediate gearfi con` 'ment' with *die pri siam; mesh 'with the other gears mi said jack and secondaiy shaft, ons of said gears mi 'the secondary :Shai' having :i clutch @gagging portion. clutch @ng-ging t'ooh on Suid priuaij' Shnf, ai clutch volhar siidzibiy keyvi on die sacumzuy shaftfn clutch foliar Slidabiy keyfi on the piixiizuy Shnf': is ciu.' 1, poi'imi nii-.f iid pinion, :i Siiiifi UML :in

` Xie iongiiudiuuiiy Qu sgml Siliin' JG-lf if C0? fuhsecmed "t0 said mal for a'bu'- munt wiih said zum, a spring Operative to actuate smidA :um'to mfc/'ve smid latta? clutch 0011111 into engzxgement with Said pinion im zum secured to Said shifting rod for moving the Othe of saisi ciuch coliais in opposite directions L@ aiteiimtciy comme@ the primary shaft and sai-'i latin' mcu'fciouid geni' O11 the secondary shaft, said coiiar @n th@ xxl being adapted, when the clutch colla? on the sec- Qnldary shaft i@ movd into operative engageary shaft, no engage the il'sfl; mentioned :firm :mii ihm-@by move the piiumi'y shui? 'uhm-h out Q' engagement Aih the piiimx. :1 'und shifting IOd, a third 'slim-l1 wlmi Hivlnhiy ii'cym'! th@ Sc@- mumy rod mui maw-Lilli@ im@ clutching' en- ;'ugfcu. i1' wih thv miller im of Suid thx@ @uns nu liw siffwwLwi'y shzi'i'. members mm'- zbi@ in (um wiiou with said shifting rods :xml 'imvizw civiles tiwxuim :uid im acl'uat ingr iwi mzipml 'lo be umx'mi ink@ either 0f mid iiaslciws lo move cihvi nl Suid Shifting 3x15 m :minute their dutch collars, Substaniiaiiiy 11:: ciibed.

-'1i testimony imi-00:? huw' signed my immo i0 'ibis spociiicniou in thv presence of fw@ Silbsvifibiug uimersses.

F {NH CAT CART Witnesses FANNIE MANDERBACH, KNETTE MARKHAM. 

